The decision to hand over the case to NIA was taken in view of international ramifcations of the case where some nationals from neighbouring country Bangladesh were also allegedly involved in this, official sources said here.
A notification was issued under the NIA Act and the agency will be registering an FIR tomorrow, the sources said.
The Union Home Ministry had receieved reports from central agencies and the state government about the incident in which two suspected militants -- Shakil Ahmed and Sovan Mandal -- were killed and another man Hasan Saheb was injured in the explosion at a house.
A large number of watch dials, SIM cards and other tools required to make improvised explosive devices were also seized from the house.
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Mamata Banerjee's government in West Bengal, which was initially reluctant to accept that the incident in Burdwan had suspected terror links, handed over the case to the state CID after material collected from the site of the incident showed that some terror group was assembling bombs in the house and were planning to carry out a strike.
Arch political rivals BJP and CPI(M) are united in asking the Centre for handing over the case to NIA for a probe as they believed that the state government was trying to hush up the matter.